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Geology Division
Geology Division
Frank Press
Chester Stock
Geology Division
Chester Stock
Robert Sharp
Eugene Shoemaker
Harrison Brown
Harrison Brown with equipment
Chester Stock
Albert E. J. Engel
Geology Division
Frederick Ransome
Arthur Gutenberg, Mrs. Hertha Gutenberg, Robert Sharp, Doris and Lee DuBridge
Gerald Wasserburg with vacuum line
Frank Press
Geology Division
Chester Stock
Hugo Benioff